Main Square of Krakow. Center point of the city and walking distance to St. Mary's Cathedral, Wawel Castle, and the Rynek Underground Museum.
The castle has its own church which has a dress code. If planning to enter, do not wear shorts/short skirts and wear a shirt that covers your shoulders.
Main Square Cathedral. If planning on touring, know that the church will be closed periodically for Mass. Dress code may be emphasized (no shorts, short skirts, or sleeveless tops).
Harry Potter Cafe and Mocktail Bar. Hidden in a side alley and underground-don't be afraid to ask for directions if you can't find it!
Underground Tour a short drive or train ride outside of Krakow.
Bus ride to Auschwitz-Birkenau is about 2 hours from Krakow.